摘要
建立离子色谱法测定核电厂闭式水体系(含有高浓度钼酸盐、甲基苯并三氮唑钠盐、磷酸盐)中F^-,Cl^-,SO4^2-含量的方法。选用Metrosep-A Supp7-250/4.0色谱柱和Metro SPM Rotor型化学抑制器,以Na2CO3作为淋洗液,以抑制性电导检测器进行测定。核电厂闭式水样品中F^-,Cl^-,SO4^2-离子在各自的质量浓度范围内与色谱峰面积呈良好的线性关系,线性相关系数均不小于0.997,检出限分别为0.0002,0.0028,0.0020 mg/L。加标回收率为93%~105%,测定结果的相对标准偏差为2.9%~6.9%(n=6)。该方法的检出限低,灵敏度高,可以推广应用。
A method for determination of F^-,Cl^-,SO4^2- in closed water system(contains high concentrations of molybdate,sodium tolyltriazole,and phosphate)of nuclear power plant by ion chromatography was established.Three anions were separated on Metrosep-A Supp7-250/4.0 column with Metro SPM Rotor as chemical suppressor and Na2CO3 solution as eluentand,then determined by suppressed conductivity detector.The mass concentration of F^-,Cl^-,SO4^2- had a good linear relationship with the chromatographic peak area in their respective ranges,the correlation coefficients were more than 0.997,the detection limits of F^-,Cl^-,SO4^2- were 0.0002,0.0028,0.002 mg/L,respectively.The recoveries of the standard addition were 93%-105%.The relative standard deviation of determination results were 2.9%-6.9%(n=6).The detection limit of this method is low and the sensitivity is high,so this method can be popularized.
作者
周连宏
崔丽君
张龙
王宇宙
ZHOU Lianhong;CUI Lijun;ZHANG Long;WANG Yuzhou(Shandong Nuclear Power Company Ltd.,Yantai 265110,China)
出处
《化学分析计量》
CAS
2020年第4期75-78,共4页
Chemical Analysis And Meterage
